iPod shuffle battery tips
If you're looking to get the most out of your iPod shuffle battery, here are some tips that can help optimize performance with each charge.

Update your software
Make sure that you have the latest iPod shuffle Software. Click here for steps to download and install the latest iPod shuffle update.

Turn iPod shuffle off
When you're not using iPod shuffle, turn it off instead of pausing. This will keep iPod shuffle from accidentally waking from sleep and playing songs if its buttons are pressed while in a pocket or bag.

Use iPod at room temperature
The battery works best when you use iPod shuffle at room temperature, generally around 68°F (20°C), but you can use iPod shuffle at temperatures anywhere between 32° to 95°F (0° to 35°C). If you've left iPod shuffle out in the cold, let it warm up to room temperature before waking it from sleep or turning it on. Otherwise, a low-battery indicator may appear when you check battery status, and the device won't wake from sleep until it warms up.

Charging
iPod shuffle fast-charges the battery to 80-percent capacity in 2 hours. However, it can take 4 hours to fully recharge the battery.